package com.example.admin.coolweather496;


import android.app.Fragment;
import android.app.ProgressDialog;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.annotation.RequiresApi;
import android.telecom.Call;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.admin.coolweather496.db.City;
import com.example.admin.coolweather496.db.County;
import com.example.admin.coolweather496.db.DataSupport;
import com.example.admin.coolweather496.db.Province;
import com.example.admin.coolweather496.util.HttpUtil;
import com.example.admin.coolweather496.util.Utility;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.security.auth.callback.Callback;

/**
 * Created by Admin on 2017/6/5.
 */
public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;

    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList=new ArrayList<>();
    /*省市县列表*/
    private List<Province> provinceList;
    private List<City> cityList;
    private List<County> countyList;
    /*选中的省市县列表*/
    private Province selectedProvince;
    private City selectedCity;
    /*当前选中的级别*/
    private int currentLevel;

    /*@RequiresApi(api = Build.VERSION_CODES.M)
    @Nullable*/
    @Override
    public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.choose_area,container,false);
        titleText =(TextView) view.findViewById(R.id.title_text);
        backButton =(Button) view.findViewById(R.id.back_button);
        listView=(ListView) view.findViewById(R.id.list_view);
       adapter=new ArrayAdapter<>(getContext(),android.R.layout.simple_list_item_1,dataList);
        listView.setAdapter(adapter);
        return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (currentLevel == LEVEL_PROVINCE) {
                    selectedProvince = provinceList.get(position);
                    queryCities();
                } else if (currentLevel == LEVEL_CITY) {
                    selectedCity = cityList.get(position);
                    queryCounties();
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                if(currentLevel==LEVEL_COUNTY){
                    queryCities();
                }else if(currentLevel==LEVEL_CITY){
                    queryProvinces();
                }
            }
        });
        queryProvinces();
    }
    /*查询全国所有的省，优先从数据库查询，如果没有查询到灾区服务器上查询*/
    private void queryProvinces(){
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList= DataSupport.findAll(Province.class);
        if(provinceList.size()>0){
            dataList.clear();
            for(Province province:provinceList){
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_PROVINCE;
        }else{
            String address="http://guolin.tech/api/china";
            queryFromServer(address,"province");
        }
    }



    private void queryCities(){
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
       cityList= DataSupport.where("provinceid=?",String.valueOf(selectedProvince.getId())).find(City.class);
        if(cityList.size()>0){
            dataList.clear();
            for(City city:cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_CITY;
        }else{
            int provinceCode=selectedProvince.getProvinceCode();
            String address="http://guolin.tech/api/china/"+provinceCode;
            queryFromServer(address,"city");
        }
    }
    /*505*/
/*查询选中市内所有的县*/
    private void queryCounties(){
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList= DataSupport.where("Cityid=?",String.valueOf(selectedCity.getId())).find(County.class);
        if(countyList.size()>0){
            dataList.clear();
            for(County county:countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_COUNTY;
        }else{
            int provinceCode=selectedProvince.getProvinceCode();
            int cityCode=selectedCity.getCityCode();
            String address="http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
            queryFromServer(address,"county");
        }
    }


    private void queryFromServer(String address,final String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address,new Callback(){
       @Override
       protected void onResponse(Call call, Response response)throws IOException{
                String responseText=response.body().string();
                boolean result=false;
                if("province".equals(type)){
                    result= Utility.handleProvinceResponse(responseText);
                }else if("city".equals(type)){
                    result= Utility.handleCityResponse(responseText,selectedProvince.getId());
                }else if("county".equals(type)){
                    result= Utility.handleCountyResponse(responseText,selectedCity.getId());
                }
                if(result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if ("province".equals(type)) {
                                queryProvinces();
                            } else if ("city".equals(type)) {
                                queryCities();
                            } else if ("county".equals(type)) {
                                queryCounties();
                            }
                        }
                    });
                }



            @Override
            public void onFailure(Call call,IOException e){
                //通过runOnUiThread（）方法回到主线程处理逻辑
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show();
                    }
            });
           }
        });
           }
/*显示进度对话框*/
    private void showProgressDialog() {
        if(progressDialog==null){
            progressDialog=new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载。。。");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }
    /*关闭进度对话框*/
    private void closeProgressDialog() {
        if(progressDialog!=null){
            progressDialog.dismiss();
        }
    }
}
